./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-12 22:26:49,326 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 22:26:49,409 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 22:26:49,414 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 22:26:49,415 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 22:26:49,442 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 22:26:49,442 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 22:26:49,443 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 22:26:49,443 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 22:26:49,445 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 22:26:49,446 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 22:26:49,446 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 22:26:49,446 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 22:26:49,447 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 22:26:49,447 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 22:26:49,447 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 22:26:49,448 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 22:26:49,449 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 22:26:49,450 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 22:26:49,450 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 22:26:49,450 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 22:26:49,451 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 22:26:49,451 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 22:26:49,451 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 22:26:49,451 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 22:26:49,452 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 22:26:49,452 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 22:26:49,452 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 22:26:49,453 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 22:26:49,453 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 22:26:49,453 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 22:26:49,453 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 22:26:49,454 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:26:49,454 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 22:26:49,454 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 22:26:49,455 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 22:26:49,455 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 22:26:49,455 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 22:26:49,455 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 22:26:49,456 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 22:26:49,456 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 22:26:49,456 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 22:26:49,457 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e1e4b700be1f29c3e51242b4a74b80feb10d65ba6788a48a42ab27b5c7017d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 22:26:49,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 22:26:49,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 22:26:49,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 22:26:49,705 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 22:26:49,705 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 22:26:49,707 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2024-09-12 22:26:51,150 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 22:26:51,337 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 22:26:51,338 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c [2024-09-12 22:26:51,346 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/0df585610/978ab0fc62df4493b6077c1d5b4ae45f/FLAG2d21b3ee4 [2024-09-12 22:26:51,360 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/0df585610/978ab0fc62df4493b6077c1d5b4ae45f [2024-09-12 22:26:51,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 22:26:51,364 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 22:26:51,365 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 22:26:51,365 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 22:26:51,373 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 22:26:51,373 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:26:51" (1/1) ... [2024-09-12 22:26:51,374 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@707a0600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:26:51, skipping insertion in model container [2024-09-12 22:26:51,375 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 10:26:51" (1/1) ... [2024-09-12 22:26:51,394 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 22:26:51,564 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] [2024-09-12 22:26:51,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:26:51,587 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 22:26:51,598 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_6.c[318,331] [2024-09-12 22:26:51,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 22:26:51,619 INFO L204 MainTranslator]: Completed translation [2024-09-12 22:26:51,620 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:26:51 WrapperNode [2024-09-12 22:26:51,620 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 22:26:51,621 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 22:26:51,621 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 22:26:51,621 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 22:26:51,628 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:26:51" (1/1) ... [2024-09-12 22:26:51,635 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:26:51" (1/1) ... [2024-09-12 22:26:51,641 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 22:26:51,642 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 22:26:51,642 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 22:26:51,642 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 22:26:51,642 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 22:26:51,652 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:26:51" (1/1) ... [2024-09-12 22:26:51,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:26:51" (1/1) ... [2024-09-12 22:26:51,653 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:26:51" (1/1) ... [2024-09-12 22:26:51,664 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-12 22:26:51,665 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:26:51" (1/1) ... [2024-09-12 22:26:51,665 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:26:51" (1/1) ... [2024-09-12 22:26:51,667 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:26:51" (1/1) ... [2024-09-12 22:26:51,671 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:26:51" (1/1) ... [2024-09-12 22:26:51,671 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:26:51" (1/1) ... [2024-09-12 22:26:51,672 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:26:51" (1/1) ... [2024-09-12 22:26:51,673 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 22:26:51,675 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 22:26:51,675 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 22:26:51,675 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 22:26:51,676 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:26:51" (1/1) ... [2024-09-12 22:26:51,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 22:26:51,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:26:51,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-12 22:26:51,712 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-12 22:26:51,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 22:26:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 22:26:51,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 22:26:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 22:26:51,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 22:26:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 22:26:51,755 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 22:26:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 22:26:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 22:26:51,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 22:26:51,803 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 22:26:51,805 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 22:26:51,911 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-12 22:26:51,911 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 22:26:51,933 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 22:26:51,933 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 22:26:51,934 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:26:51 BoogieIcfgContainer [2024-09-12 22:26:51,934 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 22:26:51,935 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 22:26:51,935 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 22:26:51,938 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 22:26:51,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 10:26:51" (1/3) ... [2024-09-12 22:26:51,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3fb4d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:26:51, skipping insertion in model container [2024-09-12 22:26:51,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 10:26:51" (2/3) ... [2024-09-12 22:26:51,940 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3fb4d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 10:26:51, skipping insertion in model container [2024-09-12 22:26:51,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 10:26:51" (3/3) ... [2024-09-12 22:26:51,941 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2024-09-12 22:26:51,956 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 22:26:51,960 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 22:26:52,008 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 22:26:52,016 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5db46f34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 22:26:52,016 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 22:26:52,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 22:26:52,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-12 22:26:52,026 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:26:52,027 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:26:52,027 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:26:52,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:52,032 INFO L85 PathProgramCache]: Analyzing trace with hash 2037564162, now seen corresponding path program 1 times [2024-09-12 22:26:52,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:26:52,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230280689] [2024-09-12 22:26:52,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:26:52,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:26:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:52,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:26:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:26:52,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:26:52,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230280689] [2024-09-12 22:26:52,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230280689] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 22:26:52,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 22:26:52,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 22:26:52,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130858770] [2024-09-12 22:26:52,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 22:26:52,228 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 22:26:52,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:26:52,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 22:26:52,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:26:52,252 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:52,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:26:52,291 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2024-09-12 22:26:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 22:26:52,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-12 22:26:52,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:26:52,299 INFO L225 Difference]: With dead ends: 37 [2024-09-12 22:26:52,299 INFO L226 Difference]: Without dead ends: 16 [2024-09-12 22:26:52,302 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 22:26:52,304 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:26:52,305 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 31 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:26:52,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-12 22:26:52,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-12 22:26:52,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-09-12 22:26:52,335 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2024-09-12 22:26:52,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:26:52,336 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-09-12 22:26:52,336 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:52,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:52,337 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-09-12 22:26:52,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-12 22:26:52,338 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:26:52,338 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:26:52,338 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 22:26:52,338 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:26:52,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:52,339 INFO L85 PathProgramCache]: Analyzing trace with hash 432983647, now seen corresponding path program 1 times [2024-09-12 22:26:52,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:26:52,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307284163] [2024-09-12 22:26:52,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:26:52,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:26:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:52,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:26:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:26:52,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:26:52,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307284163] [2024-09-12 22:26:52,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307284163] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:26:52,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367127913] [2024-09-12 22:26:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:26:52,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:26:52,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:26:52,452 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:26:52,454 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 22:26:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:52,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-12 22:26:52,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:26:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:26:52,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:26:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:26:52,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367127913] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:26:52,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:26:52,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-09-12 22:26:52,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298537143] [2024-09-12 22:26:52,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:26:52,603 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-12 22:26:52,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:26:52,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-12 22:26:52,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-12 22:26:52,608 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:52,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:26:52,671 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2024-09-12 22:26:52,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 22:26:52,672 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-12 22:26:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:26:52,675 INFO L225 Difference]: With dead ends: 31 [2024-09-12 22:26:52,675 INFO L226 Difference]: Without dead ends: 22 [2024-09-12 22:26:52,676 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-09-12 22:26:52,678 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:26:52,680 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:26:52,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-12 22:26:52,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2024-09-12 22:26:52,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:52,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-09-12 22:26:52,691 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2024-09-12 22:26:52,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:26:52,691 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-09-12 22:26:52,692 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:52,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:52,692 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-09-12 22:26:52,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-12 22:26:52,693 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:26:52,693 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:26:52,712 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 22:26:52,894 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:26:52,894 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:26:52,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:52,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1116068651, now seen corresponding path program 1 times [2024-09-12 22:26:52,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:26:52,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751888043] [2024-09-12 22:26:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:26:52,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:26:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:52,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:26:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:26:52,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:26:52,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751888043] [2024-09-12 22:26:52,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751888043] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:26:52,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239506102] [2024-09-12 22:26:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:26:52,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:26:52,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:26:52,984 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:26:52,986 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 22:26:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:53,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 22:26:53,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:26:53,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:26:53,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:26:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 22:26:53,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239506102] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:26:53,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:26:53,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-12 22:26:53,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130190517] [2024-09-12 22:26:53,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:26:53,116 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 22:26:53,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:26:53,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 22:26:53,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-12 22:26:53,119 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:53,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:26:53,185 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-09-12 22:26:53,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 22:26:53,186 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-12 22:26:53,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:26:53,186 INFO L225 Difference]: With dead ends: 44 [2024-09-12 22:26:53,187 INFO L226 Difference]: Without dead ends: 33 [2024-09-12 22:26:53,187 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-12 22:26:53,188 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:26:53,188 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:26:53,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-12 22:26:53,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-12 22:26:53,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:53,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2024-09-12 22:26:53,200 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 18 [2024-09-12 22:26:53,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:26:53,200 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2024-09-12 22:26:53,201 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:53,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:53,201 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2024-09-12 22:26:53,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 22:26:53,203 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:26:53,203 INFO L216 NwaCegarLoop]: trace histogram [7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:26:53,221 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-12 22:26:53,404 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:26:53,404 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:26:53,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:53,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1180634569, now seen corresponding path program 1 times [2024-09-12 22:26:53,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:26:53,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495128623] [2024-09-12 22:26:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:26:53,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:26:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:53,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:26:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 22:26:53,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:26:53,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495128623] [2024-09-12 22:26:53,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495128623] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:26:53,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671607750] [2024-09-12 22:26:53,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:26:53,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:26:53,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:26:53,646 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:26:53,647 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 22:26:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:53,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 22:26:53,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:26:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 22:26:53,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:26:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 22:26:53,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671607750] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:26:53,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:26:53,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-09-12 22:26:53,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070219449] [2024-09-12 22:26:53,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:26:53,810 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 22:26:53,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:26:53,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 22:26:53,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-09-12 22:26:53,811 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:53,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:26:53,866 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2024-09-12 22:26:53,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 22:26:53,867 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-09-12 22:26:53,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:26:53,868 INFO L225 Difference]: With dead ends: 65 [2024-09-12 22:26:53,868 INFO L226 Difference]: Without dead ends: 43 [2024-09-12 22:26:53,871 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2024-09-12 22:26:53,873 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 22:26:53,876 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 22:26:53,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-12 22:26:53,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-12 22:26:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2024-09-12 22:26:53,891 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 32 [2024-09-12 22:26:53,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:26:53,891 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2024-09-12 22:26:53,892 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:53,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:53,892 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2024-09-12 22:26:53,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 22:26:53,893 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:26:53,893 INFO L216 NwaCegarLoop]: trace histogram [12, 8, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:26:53,910 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 22:26:54,097 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:26:54,098 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:26:54,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:54,098 INFO L85 PathProgramCache]: Analyzing trace with hash 990963656, now seen corresponding path program 2 times [2024-09-12 22:26:54,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:26:54,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644946740] [2024-09-12 22:26:54,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:26:54,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:26:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:54,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:26:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 22:26:54,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:26:54,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644946740] [2024-09-12 22:26:54,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644946740] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:26:54,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286080259] [2024-09-12 22:26:54,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:26:54,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:26:54,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:26:54,308 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:26:54,313 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 22:26:54,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:26:54,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:26:54,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 22:26:54,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:26:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 22:26:54,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:26:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 22:26:54,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286080259] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:26:54,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:26:54,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-12 22:26:54,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637325204] [2024-09-12 22:26:54,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:26:54,618 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 22:26:54,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:26:54,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 22:26:54,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2024-09-12 22:26:54,620 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:26:54,703 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2024-09-12 22:26:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 22:26:54,704 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-12 22:26:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:26:54,705 INFO L225 Difference]: With dead ends: 85 [2024-09-12 22:26:54,705 INFO L226 Difference]: Without dead ends: 63 [2024-09-12 22:26:54,705 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2024-09-12 22:26:54,706 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:26:54,706 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:26:54,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-12 22:26:54,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-12 22:26:54,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.103448275862069) internal successors, (64), 58 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:54,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2024-09-12 22:26:54,717 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 42 [2024-09-12 22:26:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:26:54,717 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2024-09-12 22:26:54,717 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:54,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:54,718 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2024-09-12 22:26:54,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-12 22:26:54,719 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:26:54,719 INFO L216 NwaCegarLoop]: trace histogram [22, 18, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:26:54,735 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 22:26:54,922 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:26:54,923 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:26:54,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:54,923 INFO L85 PathProgramCache]: Analyzing trace with hash 736255786, now seen corresponding path program 3 times [2024-09-12 22:26:54,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:26:54,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234097034] [2024-09-12 22:26:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:26:54,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:26:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:55,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:26:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 133 proven. 342 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-12 22:26:55,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:26:55,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234097034] [2024-09-12 22:26:55,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234097034] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:26:55,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97419702] [2024-09-12 22:26:55,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:26:55,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:26:55,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:26:55,491 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:26:55,493 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 22:26:55,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 22:26:55,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:26:55,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-12 22:26:55,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:26:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2024-09-12 22:26:55,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:26:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2024-09-12 22:26:55,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97419702] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:26:55,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:26:55,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 4, 4] total 25 [2024-09-12 22:26:55,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106325394] [2024-09-12 22:26:55,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:26:55,666 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-12 22:26:55,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:26:55,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-12 22:26:55,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-09-12 22:26:55,669 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:55,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:26:55,785 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2024-09-12 22:26:55,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 22:26:55,788 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2024-09-12 22:26:55,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:26:55,789 INFO L225 Difference]: With dead ends: 99 [2024-09-12 22:26:55,789 INFO L226 Difference]: Without dead ends: 77 [2024-09-12 22:26:55,790 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-09-12 22:26:55,790 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:26:55,791 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:26:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-12 22:26:55,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-12 22:26:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 72 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2024-09-12 22:26:55,809 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 62 [2024-09-12 22:26:55,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:26:55,809 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2024-09-12 22:26:55,810 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:55,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:55,810 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2024-09-12 22:26:55,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-09-12 22:26:55,812 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:26:55,812 INFO L216 NwaCegarLoop]: trace histogram [26, 19, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:26:55,829 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-12 22:26:56,012 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-12 22:26:56,013 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:26:56,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:56,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1584478994, now seen corresponding path program 4 times [2024-09-12 22:26:56,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:26:56,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623540176] [2024-09-12 22:26:56,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:26:56,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:26:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:56,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:26:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 260 proven. 380 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-12 22:26:56,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:26:56,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623540176] [2024-09-12 22:26:56,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623540176] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:26:56,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434596884] [2024-09-12 22:26:56,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:26:56,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:26:56,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:26:56,550 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:26:56,552 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 22:26:56,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:26:56,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:26:56,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-12 22:26:56,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:26:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 260 proven. 380 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-12 22:26:56,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:26:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 260 proven. 380 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-12 22:26:57,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434596884] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:26:57,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:26:57,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 43 [2024-09-12 22:26:57,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705126474] [2024-09-12 22:26:57,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:26:57,354 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-12 22:26:57,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:26:57,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-12 22:26:57,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 22:26:57,357 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:26:57,499 INFO L93 Difference]: Finished difference Result 153 states and 196 transitions. [2024-09-12 22:26:57,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-12 22:26:57,500 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2024-09-12 22:26:57,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:26:57,502 INFO L225 Difference]: With dead ends: 153 [2024-09-12 22:26:57,502 INFO L226 Difference]: Without dead ends: 119 [2024-09-12 22:26:57,503 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 22:26:57,505 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:26:57,505 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:26:57,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-09-12 22:26:57,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-09-12 22:26:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.105263157894737) internal successors, (126), 114 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:57,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2024-09-12 22:26:57,525 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 76 [2024-09-12 22:26:57,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:26:57,525 INFO L474 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2024-09-12 22:26:57,525 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:26:57,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:57,526 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2024-09-12 22:26:57,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-09-12 22:26:57,527 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:26:57,527 INFO L216 NwaCegarLoop]: trace histogram [47, 40, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:26:57,546 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 22:26:57,730 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:26:57,731 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:26:57,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:26:57,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1073042163, now seen corresponding path program 5 times [2024-09-12 22:26:57,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:26:57,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529410784] [2024-09-12 22:26:57,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:26:57,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:26:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:59,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:26:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:26:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 533 proven. 1640 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-12 22:26:59,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:26:59,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529410784] [2024-09-12 22:26:59,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529410784] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:26:59,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472045229] [2024-09-12 22:26:59,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:26:59,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:26:59,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:26:59,361 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:26:59,363 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 22:26:59,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2024-09-12 22:26:59,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:26:59,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-12 22:26:59,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:27:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 1292 proven. 389 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2024-09-12 22:27:00,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:27:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 1292 proven. 389 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2024-09-12 22:27:01,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472045229] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:27:01,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:27:01,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 22, 22] total 83 [2024-09-12 22:27:01,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392315251] [2024-09-12 22:27:01,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:27:01,616 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-09-12 22:27:01,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:27:01,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-09-12 22:27:01,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2024-09-12 22:27:01,621 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand has 83 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 states have internal predecessors, (192), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:27:02,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:27:02,110 INFO L93 Difference]: Finished difference Result 303 states and 400 transitions. [2024-09-12 22:27:02,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-09-12 22:27:02,111 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 states have internal predecessors, (192), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2024-09-12 22:27:02,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:27:02,113 INFO L225 Difference]: With dead ends: 303 [2024-09-12 22:27:02,113 INFO L226 Difference]: Without dead ends: 269 [2024-09-12 22:27:02,117 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2024-09-12 22:27:02,118 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 137 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:27:02,118 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 66 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:27:02,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-09-12 22:27:02,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2024-09-12 22:27:02,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.1856060606060606) internal successors, (313), 264 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:27:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 317 transitions. [2024-09-12 22:27:02,150 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 317 transitions. Word has length 118 [2024-09-12 22:27:02,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:27:02,151 INFO L474 AbstractCegarLoop]: Abstraction has 269 states and 317 transitions. [2024-09-12 22:27:02,151 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.3132530120481927) internal successors, (192), 83 states have internal predecessors, (192), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:27:02,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:27:02,152 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 317 transitions. [2024-09-12 22:27:02,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2024-09-12 22:27:02,155 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:27:02,155 INFO L216 NwaCegarLoop]: trace histogram [85, 44, 44, 41, 40, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:27:02,172 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 22:27:02,359 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:27:02,360 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:27:02,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:27:02,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2107848675, now seen corresponding path program 6 times [2024-09-12 22:27:02,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:27:02,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569054060] [2024-09-12 22:27:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:27:02,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:27:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:27:04,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:27:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:27:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9117 backedges. 3654 proven. 1722 refuted. 0 times theorem prover too weak. 3741 trivial. 0 not checked. [2024-09-12 22:27:04,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:27:04,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569054060] [2024-09-12 22:27:04,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569054060] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:27:04,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428930189] [2024-09-12 22:27:04,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 22:27:04,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:27:04,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:27:04,376 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:27:04,378 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 22:27:04,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-09-12 22:27:04,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:27:04,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 22:27:04,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:27:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9117 backedges. 1084 proven. 32 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2024-09-12 22:27:04,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:27:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9117 backedges. 1084 proven. 32 refuted. 0 times theorem prover too weak. 8001 trivial. 0 not checked. [2024-09-12 22:27:04,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428930189] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:27:04,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:27:04,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 7, 7] total 54 [2024-09-12 22:27:04,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769012541] [2024-09-12 22:27:04,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:27:04,868 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-12 22:27:04,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:27:04,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-12 22:27:04,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 22:27:04,873 INFO L87 Difference]: Start difference. First operand 269 states and 317 transitions. Second operand has 54 states, 54 states have (on average 2.574074074074074) internal successors, (139), 54 states have internal predecessors, (139), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:27:05,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:27:05,076 INFO L93 Difference]: Finished difference Result 477 states and 592 transitions. [2024-09-12 22:27:05,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-09-12 22:27:05,077 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.574074074074074) internal successors, (139), 54 states have internal predecessors, (139), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 268 [2024-09-12 22:27:05,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:27:05,079 INFO L225 Difference]: With dead ends: 477 [2024-09-12 22:27:05,079 INFO L226 Difference]: Without dead ends: 295 [2024-09-12 22:27:05,081 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 22:27:05,081 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 22:27:05,082 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 45 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 22:27:05,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-09-12 22:27:05,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2024-09-12 22:27:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.210344827586207) internal successors, (351), 290 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:27:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 355 transitions. [2024-09-12 22:27:05,099 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 355 transitions. Word has length 268 [2024-09-12 22:27:05,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:27:05,100 INFO L474 AbstractCegarLoop]: Abstraction has 295 states and 355 transitions. [2024-09-12 22:27:05,100 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.574074074074074) internal successors, (139), 54 states have internal predecessors, (139), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:27:05,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:27:05,100 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 355 transitions. [2024-09-12 22:27:05,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2024-09-12 22:27:05,103 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:27:05,103 INFO L216 NwaCegarLoop]: trace histogram [92, 50, 50, 42, 40, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:27:05,120 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-12 22:27:05,304 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:27:05,304 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:27:05,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:27:05,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1689622166, now seen corresponding path program 7 times [2024-09-12 22:27:05,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:27:05,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014283050] [2024-09-12 22:27:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:27:05,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:27:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:27:07,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:27:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:27:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10914 backedges. 4257 proven. 1806 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-12 22:27:07,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:27:07,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014283050] [2024-09-12 22:27:07,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014283050] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:27:07,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79012565] [2024-09-12 22:27:07,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 22:27:07,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:27:07,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:27:07,420 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:27:07,421 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 22:27:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:27:07,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-09-12 22:27:07,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:27:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10914 backedges. 4257 proven. 1806 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-12 22:27:07,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:27:09,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10914 backedges. 4257 proven. 1806 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-12 22:27:09,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79012565] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:27:09,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:27:09,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 89 [2024-09-12 22:27:09,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14358112] [2024-09-12 22:27:09,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:27:09,679 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-09-12 22:27:09,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:27:09,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-09-12 22:27:09,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2024-09-12 22:27:09,684 INFO L87 Difference]: Start difference. First operand 295 states and 355 transitions. Second operand has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 89 states have internal predecessors, (187), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:27:09,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:27:09,923 INFO L93 Difference]: Finished difference Result 589 states and 753 transitions. [2024-09-12 22:27:09,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-09-12 22:27:09,923 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 89 states have internal predecessors, (187), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 294 [2024-09-12 22:27:09,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:27:09,925 INFO L225 Difference]: With dead ends: 589 [2024-09-12 22:27:09,925 INFO L226 Difference]: Without dead ends: 383 [2024-09-12 22:27:09,928 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2024-09-12 22:27:09,929 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 22:27:09,929 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 22:27:09,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-09-12 22:27:09,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2024-09-12 22:27:09,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 378 states have (on average 1.1613756613756614) internal successors, (439), 378 states have internal predecessors, (439), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:27:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 443 transitions. [2024-09-12 22:27:09,951 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 443 transitions. Word has length 294 [2024-09-12 22:27:09,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:27:09,953 INFO L474 AbstractCegarLoop]: Abstraction has 383 states and 443 transitions. [2024-09-12 22:27:09,954 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.101123595505618) internal successors, (187), 89 states have internal predecessors, (187), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:27:09,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:27:09,955 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 443 transitions. [2024-09-12 22:27:09,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2024-09-12 22:27:09,959 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:27:09,959 INFO L216 NwaCegarLoop]: trace histogram [136, 86, 50, 50, 40, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:27:09,976 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-12 22:27:10,163 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-12 22:27:10,164 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:27:10,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:27:10,164 INFO L85 PathProgramCache]: Analyzing trace with hash -979945966, now seen corresponding path program 8 times [2024-09-12 22:27:10,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:27:10,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943448920] [2024-09-12 22:27:10,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:27:10,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:27:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:27:16,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:27:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:27:16,459 INFO L134 CoverageAnalysis]: Checked inductivity of 20946 backedges. 8613 proven. 7482 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-12 22:27:16,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:27:16,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943448920] [2024-09-12 22:27:16,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943448920] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:27:16,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133397461] [2024-09-12 22:27:16,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 22:27:16,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:27:16,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:27:16,464 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:27:16,465 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 22:27:16,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 22:27:16,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:27:16,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 174 conjuncts are in the unsatisfiable core [2024-09-12 22:27:16,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:27:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 20946 backedges. 8613 proven. 7482 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-12 22:27:16,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:27:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 20946 backedges. 8613 proven. 7482 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-12 22:27:24,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133397461] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:27:24,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:27:24,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 177 [2024-09-12 22:27:24,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333406197] [2024-09-12 22:27:24,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:27:24,131 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2024-09-12 22:27:24,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:27:24,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2024-09-12 22:27:24,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2024-09-12 22:27:24,141 INFO L87 Difference]: Start difference. First operand 383 states and 443 transitions. Second operand has 177 states, 177 states have (on average 2.0508474576271185) internal successors, (363), 177 states have internal predecessors, (363), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:27:24,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:27:24,694 INFO L93 Difference]: Finished difference Result 765 states and 973 transitions. [2024-09-12 22:27:24,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2024-09-12 22:27:24,695 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 2.0508474576271185) internal successors, (363), 177 states have internal predecessors, (363), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 382 [2024-09-12 22:27:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:27:24,697 INFO L225 Difference]: With dead ends: 765 [2024-09-12 22:27:24,698 INFO L226 Difference]: Without dead ends: 559 [2024-09-12 22:27:24,701 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 854 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=15576, Invalid=15576, Unknown=0, NotChecked=0, Total=31152 [2024-09-12 22:27:24,701 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 22:27:24,702 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 22:27:24,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2024-09-12 22:27:24,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2024-09-12 22:27:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 554 states have (on average 1.1101083032490975) internal successors, (615), 554 states have internal predecessors, (615), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:27:24,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 619 transitions. [2024-09-12 22:27:24,734 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 619 transitions. Word has length 382 [2024-09-12 22:27:24,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:27:24,735 INFO L474 AbstractCegarLoop]: Abstraction has 559 states and 619 transitions. [2024-09-12 22:27:24,735 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 2.0508474576271185) internal successors, (363), 177 states have internal predecessors, (363), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:27:24,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:27:24,739 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 619 transitions. [2024-09-12 22:27:24,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2024-09-12 22:27:24,748 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:27:24,749 INFO L216 NwaCegarLoop]: trace histogram [224, 174, 50, 50, 40, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:27:24,767 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-12 22:27:24,950 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-12 22:27:24,950 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:27:24,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:27:24,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1825683722, now seen corresponding path program 9 times [2024-09-12 22:27:24,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:27:24,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111851925] [2024-09-12 22:27:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:27:24,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:27:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:27:49,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:27:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:27:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 52626 backedges. 17325 proven. 30450 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2024-09-12 22:27:49,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:27:49,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111851925] [2024-09-12 22:27:49,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111851925] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:27:49,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595137479] [2024-09-12 22:27:49,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 22:27:49,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:27:49,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:27:49,492 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:27:49,494 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 22:27:49,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-09-12 22:27:49,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:27:49,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 22:27:49,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:27:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 52626 backedges. 5323 proven. 200 refuted. 0 times theorem prover too weak. 47103 trivial. 0 not checked. [2024-09-12 22:27:50,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:27:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 52626 backedges. 5323 proven. 200 refuted. 0 times theorem prover too weak. 47103 trivial. 0 not checked. [2024-09-12 22:27:52,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595137479] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:27:52,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:27:52,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [177, 13, 13] total 199 [2024-09-12 22:27:52,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444439882] [2024-09-12 22:27:52,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:27:52,255 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 199 states [2024-09-12 22:27:52,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:27:52,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2024-09-12 22:27:52,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2024-09-12 22:27:52,268 INFO L87 Difference]: Start difference. First operand 559 states and 619 transitions. Second operand has 199 states, 199 states have (on average 2.2763819095477387) internal successors, (453), 199 states have internal predecessors, (453), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:27:53,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:27:53,338 INFO L93 Difference]: Finished difference Result 815 states and 972 transitions. [2024-09-12 22:27:53,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2024-09-12 22:27:53,338 INFO L78 Accepts]: Start accepts. Automaton has has 199 states, 199 states have (on average 2.2763819095477387) internal successors, (453), 199 states have internal predecessors, (453), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 558 [2024-09-12 22:27:53,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:27:53,342 INFO L225 Difference]: With dead ends: 815 [2024-09-12 22:27:53,342 INFO L226 Difference]: Without dead ends: 609 [2024-09-12 22:27:53,345 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1294 GetRequests, 1097 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=19701, Invalid=19701, Unknown=0, NotChecked=0, Total=39402 [2024-09-12 22:27:53,346 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 22:27:53,346 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 22:27:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2024-09-12 22:27:53,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2024-09-12 22:27:53,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 604 states have (on average 1.140728476821192) internal successors, (689), 604 states have internal predecessors, (689), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:27:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 693 transitions. [2024-09-12 22:27:53,379 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 693 transitions. Word has length 558 [2024-09-12 22:27:53,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:27:53,380 INFO L474 AbstractCegarLoop]: Abstraction has 609 states and 693 transitions. [2024-09-12 22:27:53,380 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 199 states, 199 states have (on average 2.2763819095477387) internal successors, (453), 199 states have internal predecessors, (453), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:27:53,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:27:53,381 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 693 transitions. [2024-09-12 22:27:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2024-09-12 22:27:53,384 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:27:53,384 INFO L216 NwaCegarLoop]: trace histogram [237, 175, 62, 62, 40, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:27:53,399 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-12 22:27:53,584 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:27:53,585 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:27:53,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:27:53,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1149410067, now seen corresponding path program 10 times [2024-09-12 22:27:53,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:27:53,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005753674] [2024-09-12 22:27:53,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:27:53,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:27:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:18,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:28:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:28:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 59951 backedges. 21648 proven. 30800 refuted. 0 times theorem prover too weak. 7503 trivial. 0 not checked. [2024-09-12 22:28:18,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:28:18,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005753674] [2024-09-12 22:28:18,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005753674] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:28:18,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817724255] [2024-09-12 22:28:18,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 22:28:18,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:28:18,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:28:18,896 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:28:18,897 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 22:28:19,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 22:28:19,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:28:19,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 1528 conjuncts, 352 conjuncts are in the unsatisfiable core [2024-09-12 22:28:19,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:28:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 59951 backedges. 21648 proven. 30800 refuted. 0 times theorem prover too weak. 7503 trivial. 0 not checked. [2024-09-12 22:28:19,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:28:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 59951 backedges. 21648 proven. 30800 refuted. 0 times theorem prover too weak. 7503 trivial. 0 not checked. [2024-09-12 22:28:48,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817724255] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:28:48,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:28:48,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [178, 178, 178] total 355 [2024-09-12 22:28:48,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823254095] [2024-09-12 22:28:48,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:28:48,068 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 355 states [2024-09-12 22:28:48,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:28:48,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 355 interpolants. [2024-09-12 22:28:48,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62835, Invalid=62835, Unknown=0, NotChecked=0, Total=125670 [2024-09-12 22:28:48,090 INFO L87 Difference]: Start difference. First operand 609 states and 693 transitions. Second operand has 355 states, 355 states have (on average 2.0253521126760563) internal successors, (719), 355 states have internal predecessors, (719), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:50,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 22:28:50,313 INFO L93 Difference]: Finished difference Result 1217 states and 1562 transitions. [2024-09-12 22:28:50,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 354 states. [2024-09-12 22:28:50,314 INFO L78 Accepts]: Start accepts. Automaton has has 355 states, 355 states have (on average 2.0253521126760563) internal successors, (719), 355 states have internal predecessors, (719), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 608 [2024-09-12 22:28:50,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 22:28:50,318 INFO L225 Difference]: With dead ends: 1217 [2024-09-12 22:28:50,318 INFO L226 Difference]: Without dead ends: 963 [2024-09-12 22:28:50,324 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1395 GetRequests, 1042 SyntacticMatches, 0 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=62835, Invalid=62835, Unknown=0, NotChecked=0, Total=125670 [2024-09-12 22:28:50,325 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 22:28:50,325 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 22:28:50,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2024-09-12 22:28:50,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2024-09-12 22:28:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 958 states have (on average 1.0887265135699373) internal successors, (1043), 958 states have internal predecessors, (1043), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1047 transitions. [2024-09-12 22:28:50,375 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1047 transitions. Word has length 608 [2024-09-12 22:28:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 22:28:50,376 INFO L474 AbstractCegarLoop]: Abstraction has 963 states and 1047 transitions. [2024-09-12 22:28:50,377 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 355 states, 355 states have (on average 2.0253521126760563) internal successors, (719), 355 states have internal predecessors, (719), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 22:28:50,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:50,377 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1047 transitions. [2024-09-12 22:28:50,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 963 [2024-09-12 22:28:50,384 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 22:28:50,384 INFO L216 NwaCegarLoop]: trace histogram [414, 352, 62, 62, 40, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 22:28:50,403 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-12 22:28:50,585 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-12 22:28:50,585 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 22:28:50,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 22:28:50,586 INFO L85 PathProgramCache]: Analyzing trace with hash 222980256, now seen corresponding path program 11 times [2024-09-12 22:28:50,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 22:28:50,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330392527] [2024-09-12 22:28:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 22:28:50,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 22:28:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:30:59,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 22:30:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 22:30:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 175178 backedges. 43419 proven. 124256 refuted. 0 times theorem prover too weak. 7503 trivial. 0 not checked. [2024-09-12 22:30:59,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 22:30:59,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330392527] [2024-09-12 22:30:59,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330392527] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 22:30:59,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671917991] [2024-09-12 22:30:59,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 22:30:59,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 22:30:59,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 22:30:59,930 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 22:30:59,930 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 22:31:02,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 372 check-sat command(s) [2024-09-12 22:31:02,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 22:31:02,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 2275 conjuncts, 334 conjuncts are in the unsatisfiable core [2024-09-12 22:31:02,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 22:31:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 175178 backedges. 95644 proven. 36010 refuted. 0 times theorem prover too weak. 43524 trivial. 0 not checked. [2024-09-12 22:31:53,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 22:33:06,547 INFO L134 CoverageAnalysis]: Checked inductivity of 175178 backedges. 95644 proven. 36010 refuted. 0 times theorem prover too weak. 43524 trivial. 0 not checked. [2024-09-12 22:33:06,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671917991] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 22:33:06,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 22:33:06,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [355, 188, 188] total 727 [2024-09-12 22:33:06,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615552213] [2024-09-12 22:33:06,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 22:33:06,550 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 727 states [2024-09-12 22:33:06,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 22:33:06,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 727 interpolants. [2024-09-12 22:33:06,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263901, Invalid=263901, Unknown=0, NotChecked=0, Total=527802 [2024-09-12 22:33:06,613 INFO L87 Difference]: Start difference. First operand 963 states and 1047 transitions. Second operand has 727 states, 727 states have (on average 2.2393397524071528) internal successors, (1628), 727 states have internal predecessors, (1628), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Killed by 15